[Wylug-help] D uninterruptible sleep (usually IO) WAS: NFS woes

[Roger Leigh]

Dave Fisher <davef at gbdirect.co.uk> writes:

>  ... mmm ... still no solution, but one intriguing bit of diagnostic
> info.
>
> ps reports:
>
> nfsuser       658  0.0  0.2  1936  796 ?        D    19:13   0:04 /usr/sbin/rpc.nfsd
>
> indicating that it is in "D uninterruptible sleep"

Are you dropping incoming UDP packets?

> ... so, unfortunately are several dvd writing processes like growisofs
> and mkisofs (thereby preventing all access to the dvd writer).
>
> Is there any reasonable way of waking the damn things up and killing
> them off?

No.  They are stuck on a kernel wait queue and won't run again until
whatever system call they are stuck in has completed.  Until then, you
can't send any signals, including SIGKILL.

If you try some ps options, you'll be able to see exactly which call
it's stuck in, which might be helpful.


--
Roger Leigh

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